20221022 has 4 divisors (see below), whose sum is σ = 30331536. Its totient is φ = 10110510.

The previous prime is 20221009. The next prime is 20221027. The reversal of 20221022 is 22012202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22012202 = 2 ⋅11006101.

It is a junction number, because it is equal to n+sod(n) for n = 20220994 and 20221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055254 + ... + 5055257.

It is an arithmetic number, because the mean of its divisors is an integer number (7582884).

Almost surely, 2^20221022 is an apocalyptic number.

20221022 is a deficient number, since it is larger than the sum of its proper divisors (10110514).

20221022 is a wasteful number, since it uses less digits than its factorization.

20221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110513.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20221022 is about 4496.7790695119. The cubic root of 20221022 is about 272.4380107572.

Adding to 20221022 its reverse (22012202), we get a palindrome (42233224).

The spelling of 20221022 in words is "twenty million, two hundred twenty-one thousand, twenty-two".